DINO

The in-house code DINO enabling Direct Numerical Simulations (DNS) of turbulent, possibly multiphase, possibly reacting flows in simple as well as complex geometries (thanks to the implemented Immersed Boundary Method) is freely available for fundamental research projects on simple Email request sent to the main developer, Dr. Abouelmagd Abdelsamie (Email: ). The original description of the code can be found in [1]. DINO is a high-order finite-difference code written mainly in FORTRAN 90 and using Message-Passing Interface (MPI) for a highly efficient parallelization on CPU-based High-Performance Computers. Domain Decomposition relies on the open-source library 2DECOMP&FFT, also used for pressure-velocity coupling in the incompressible and low-Mach solvers. Stiff terms can be integrated with a point-implicit solver, the remaining terms being usually solved in time with a Runge-Kutta procedure. Files are written in HDF5 format.

DINO has been used for many studies documented in the scientific literature regarding, among others, pure turbulent flows [2], turbulent combustion [3], spray flames [4], nanoparticle generation in flames [5], as well as medical flows [6].

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Selected references

[1] Abdelsamie, A., Fru, G., Oster, T., Dietzsch, F., Janiga, G. and Thévenin, D., Towards Direct Numerical Simulations of low-Mach number turbulent reacting and two-phase flows using Immersed Boundaries. Comput. Fluids 131, (2016) 123-141.

[2] Chi, C., Thévenin, D., Smits, A.J., Wolligandt, S. and Theisel, H., Identification and analysis of very-large-scale turbulent motions using multi-scale proper orthogonal decomposition. Phys. Rev. Fluids 7, (2022) 084603/1-19.

[3] Chi, C., Han, W. and Thévenin, D., Local extinction characteristics of turbulent premixed H2/air flame under sub-atmospheric pressure conditions: A DNS study. Combust. Flame, (2025) in press.

[4] Abdelsamie, A. and Thévenin, D., Impact of multi-component evaporation on turbulent spray combustion investigated by Direct Numerical Simulation. Appl. Energy Combust. Sci. 23, (2025) 100355/1-14.

[5] Abdelsamie, A., Guan, W., Nanjaiah, M., Wlokas, I., Wiggers, H. and Thévenin, D., Investigating the impact of dispersion gas composition on the flame structure in the SpraySyn burner using DNS. Proc. Combust. Inst. 40, (2024) 105398/1-8.

[6] Abdelsamie, A., Voß, S., Berg, P., Chi, C., Arens, C., Thévenin, D. and Janiga, G., Comparing LES and URANS results with a reference DNS of the transitional airflow in a patient-specific larynx geometry during exhalation. Comput. Fluids 255, (2023) 105819/1-13.